2981143 has 4 divisors (see below), whose sum is σ = 3252168. Its totient is φ = 2710120.

The previous prime is 2981123. The next prime is 2981149. The reversal of 2981143 is 3411892.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2981143 - 2²¹ = 883991 is a prime.

It is a Duffinian number.

2981143 is a lucky number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135496 + ... + 135517.

It is an arithmetic number, because the mean of its divisors is an integer number (813042).

2^2981143 is an apocalyptic number.

2981143 is a deficient number, since it is larger than the sum of its proper divisors (271025).

2981143 is a wasteful number, since it uses less digits than its factorization.

2981143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271024.

The product of its digits is 1728, while the sum is 28.

The square root of 2981143 is about 1726.5986794852. The cubic root of 2981143 is about 143.9221383343.

It can be divided in two parts, 298 and 1143, that added together give a palindrome (1441).

The spelling of 2981143 in words is "two million, nine hundred eighty-one thousand, one hundred forty-three".